Buscar
Mostrando ítems 1301-1310 de 2813
Avaliação da resistência à corrosão de aços revestidos ou não com zinco fosfatizados e pintados
(Universidade Federal de Minas GeraisUFMG, 2010-03-29)
Corrosion problems have led the automotive industry to improve its corrosion performance with the introduction of different pretreatments and painting techniques. The use of galvanized steels has expanded a great deal in ...
Avaliação da resistência à corrosão de aços carbono baixa liga usando a espectroscopia de impedância eletroquímica e ensaios de campo
(Universidade Federal de Minas GeraisUFMG, 2013-04-17)
Low alloy steels have great mechanical strength, ductility and when receive addition of certain alloying elements good resistance to atmospheric corrosion. Such steels are therefore of great technological and economic ...
Estudo da correlação entre corrosão sob tensão e permeação de hidrogênio em aço carbono utilizando técnicas eletroquímicas para verificação da influência do meio H2S no aço utilizado
(Universidade Federal de Minas GeraisUFMG, 2012-02-27)
Steels used in pipelines operating in sour service environment are subjected to high pressures and high concentrations of H2S, and this environment is favorable for the occurrence of corrosion of the material. Several types ...
Avaliação da corrosão interna em minerodutos brasileiros para transporte de minério de ferro
(Universidade Federal de Minas GeraisUFMG, 2016-06-08)
The transport capacity of long-distance slurry pumping systems is directly related to the roughness of the pipe. In this context, corrosion plays an important role, especially when dealing with old pipes. Corrosion also ...
Avaliação da resistência à corrosão de tanques automotivos com recobrimento organometálico
(Universidade Federal de Minas GeraisUFMG, 2013-11-12)
In the last decade, the automotive industry has been replacing plastic fuel tanks for metallic tanks. The metallic tanks are impermeable to hydrocarbons, do not need to be painted after stamping and are 100% recyclable. ...
Influência das características microestruturais sobre a resistência a corrosão sob tensão de aço HSS em ambiente aquoso contendo H2S
(Universidade Federal de Minas GeraisUFMG, 2014-03-31)
In this work, the influence of the microstructure of different chemical compositions of grade C110 - API 5CT steel on sulfide stress corrosion(SSC) performance was analyzed in terms of type, size and distribution of ...
Um estudo sobre a corrosão aquosa de ligas de alumínio 7xxx submetidas a diferentes tratamentos térmicos
(2002-12-01)
This job aim has been to study the aqueous corrosion of the 7xxx heattreatable aluminium alloys, used in the aeronautical industry. The 7010, 7050 and 7475 alloys, have been supplied in the T7 condition and submitted to ...
Efeito do nitrato e nitrito na corrosão das ligas de alumínio 2024 e 7050 em soluções de NaCl
(2002-12-01)
The 2024-T3 and 7050-T7 aluminium alloys electrochemical behavior has been studied in NaCl 5% neutral solutions and 0,1M concentration containing NO 3 - or NO 2 -. The current job supports corrosion research on aluminium ...
Estudo das características morfológicas dos pites nos materiais resistentes à corrosão
(2003-12-01)
This paper has as a purpose a new alternative technique development to characterize pitting corrosion evolution, aiming classification, size and determination of morphological parameters which rule pits increase. In this ...
Propriedades mecânicas e de corrosão de dois aços inoxidáveis austeníticos utilizados na fabricação de implantes ortopédicos
(2007-01-01)
ASTM F 138 austenitic stainless steel is extensively used as an orthopedic implant material. However, some aspects, such as low strength in the annealed condition and susceptibility to localized corrosion, limit wider use ...